Home / 651,107.20-976,660.80-402,275.20

Finding the Fourth Proportional to 651,107.20, 976,660.80 and 402,275.20

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Solution

The fourth proportional to 651,107.20, 976,660.80 and 402,275.20 is: 603,412.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,107.20 : 976,660.80 = 402,275.20 : x
  2. Step 2: Convert to fraction form
    651,107.20/976,660.80 = 402,275.20/x
  3. Step 3: Cross multiply
    651,107.20x = 976,660.80 × 402,275.20
  4. Step 4: Simplify right side
    651,107.20x = 392,886,418,652.16
  5. Step 5: Solve for x
    x = 392,886,418,652.16/651,107.20
  6. Step 6: Final answer
    x = 603,412.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.